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    END COVER ASSEMBLY, SECONDARY BATTERY, BATTERY PACK AND ELECTRIC DEVICE
    83.
    发明申请
    END COVER ASSEMBLY, SECONDARY BATTERY, BATTERY PACK AND ELECTRIC DEVICE 有权

    公开(公告)号：US20220123418A1

    公开(公告)日：2022-04-21

    申请号：US17565490

    申请日：2021-12-30

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Huaichao Tang ,  Wei Li ,  Kai Wu ,  Chengdu Liang

    IPC: H01M50/271 ,  H01M50/505 ,  H01M50/583 ,  H01M50/55

    Abstract: The disclosure relates to an end cover assembly, a secondary battery, a battery pack and an electric device. An end cover assembly for a secondary battery includes: an end cover; a first terminal including a first connecting section and a second connecting section disposed along a radial direction; a second terminal including a third connecting section, a fuse section and a fourth connecting section sequentially connected along the radial direction; along an axial direction, orthographic projections of the first and third connecting sections at least partially overlap with each other, one of the first and third connecting sections is configured to connect with a busbar, the other is configured to connect with an electrode assembly, the fourth connecting section is configured to connect with the second connecting section; and an insulating component, at least a part of which is located between the first connecting section and the third connecting section.

    ELECTROLYTE, LITHIUM-ION BATTERY, AND APPARATUS CONTAINING SUCH LITHIUM-ION BATTERY
    85.
    发明申请
    ELECTROLYTE, LITHIUM-ION BATTERY, AND APPARATUS CONTAINING SUCH LITHIUM-ION BATTERY 有权

    公开(公告)号：US20220102757A1

    公开(公告)日：2022-03-31

    申请号：US17511384

    申请日：2021-10-26

    Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

    Inventor： Chengdu Liang ,  Chenghua Fu ,  Peipei Chen ,  Bin Jiang

    IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/42 ,  H01M10/0569 ,  H01M10/0585 ,  H01M4/505 ,  H01M4/525

    Abstract: This application provides an electrolyte, a lithium-ion battery, and an apparatus containing the lithium-ion battery. The electrolyte includes a lithium salt, an organic solvent, and an additive. The additive includes a sulfur-containing compound and lithium difluorophosphate, and a reduction potential of the sulfur-containing compound is higher than a reduction potential of lithium difluorophosphate. Because the reduction potential of the sulfur-containing compound is higher than the reduction potential of lithium difluorophosphate, the sulfur-containing compound can form a low-impedance SEI film on a surface of a negative electrode prior to lithium difluorophosphate, allowing more lithium difluorophosphate to form a passivation film with good thermostability on a surface of a positive electrode, so that the lithium-ion battery has good high-temperature storage performance and cycling performance, without suffering performance deterioration such as lithium precipitation.

    Current collector, electrode plate including the same and electrochemical device
    88.
    发明授权
    Current collector, electrode plate including the same and electrochemical device 有权

    公开(公告)号：US11177479B2

    公开(公告)日：2021-11-16

    申请号：US16342831

    申请日：2018-12-05

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Chengdu Liang ,  Huafeng Huang ,  Qisen Huang

    IPC: H01M4/66 ,  H01M10/0525 ,  H01M4/64

    Abstract: The present disclosure relates to the field of battery and, in particular, relates to a current collector, an electrode plate including the current collector, and an electrochemical device. The current collector of the present disclosure includes an insulation layer and a conductive layer. The insulation layer is used to support the conductive layer. The conductive layer is used to support an electrode active material layer and is located on at least one surface of the insulation layer. The insulation layer has a density smaller than that of the conductive layer. The insulation layer has a thickness of D1 satisfying 1 μm≤D1≤10 μm. The conductive layer has a thickness of D2 satisfying 200 nm≤D2≤1.5 μm. The insulation layer has a tensile strength greater than or equal to 150 MPa.

    Electrolyte and electrochemical device
    90.
    发明授权
    Electrolyte and electrochemical device 有权

    公开(公告)号：US10826124B2

    公开(公告)日：2020-11-03

    申请号：US16388216

    申请日：2017-07-18

    Applicant: Contemporary Amperex Technology Co., Limited

    Inventor： Tiancheng Yi ,  Chunhua Hu ,  Yao Jiang ,  Lu Miao ,  Chengdu Liang

    IPC: H01M10/0525 ,  H01M10/0567 ,  C07D239/04 ,  C07D241/04 ,  C07D251/04 ,  C07D317/34 ,  C07D327/04 ,  H01G11/06 ,  H01G11/64 ,  H01M6/16

    Abstract: An electrolyte and an electrochemical device, which relates to the field of energy storage materials. The electrolyte includes an additive A, an additive B and an additive C, the additive A selected from a group consisting of multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 or Formula I-3, and combinations thereof, the additive B is at least one sulfonate compound, and the additive C is at least one halogenated cyclic carbonate compound. The electrochemical device includes the above electrolyte. The electrolyte of the present disclosure can effectively passivate the surface activity of the positive electrode material, inhibit the oxidation of the electrolyte, and effectively reduce gas production of a battery, meanwhile the electrolyte can be also adsorbed catalytically active of the graphite surface to form a more stable SEI film, thereby effectively reducing side reactions

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